1 (12 oz.) pkg. frozen red raspberries
8 oz. frozen unsweetened pitted dark red cherries
6 oz. can frozen apple juice concentrate, thawed
24 oz. lemon-lime drink (soda)

Thaw frozen fruit; do not drain. Place in blender. Strain and discard seeds. Add apple juice and blend until smooth. Freeze overnight. Thaw until slushy and add lemon-lime.